Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

A blonde put eyeliner on her head. Why?

In the picture given below, can you find out which digit will take place of the question mark?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

Count the number of triangles in the picture below:

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?

People put me on the table and cut me but do not eat me. What am I?

What jumps when it walks and sits when it stands?

Find the number of squares in the below picture